The MAN brake drum 81501100104 is designed for rear axle applications in MAN trucks, specifically models like the TGA, TGS, TGX, F90, and F2000. It weighs around 53.5 to 55 kg and has a diameter of 410 mm with 10 bolt holes and a 23 mm bore. The bolt circle diameter is 335 mm, making it a durable and precise component for the heavy-duty braking systems required in these vehicles​.